babygirlblue, I think we have all been in situations where we have acted quickly, or out of character.
I think what you need to figure out is why you reacted that way. Was the paddling breaking a pre-arranged limit? Did he scare you? Or were you just rebelling against the punishment?
I tend to have a rather fiesty spirit, and there are times that it is difficult for me to submit and accept a punishment. However, I recognize that He always has my best interests in mind (even though it may not seem like it at the time), and we talk it through.
Nobody can tell you if what happened was "wrong" other than yourself. BDSM, by its very nature, creates a very intense dynamic between the two people involved. And every couple is different than the next.
To me, the absolutely most important thing in a D/s relationship is communication. When I have confusing or troubling feelings, I find it best to talk to Him directly. It's not always easy, but as your Dom he should be there to support you and help you grow in your submission.
Hope this helps.
-lily